initParams in managed code

05-24-2007 3:53 PM |

I've seen a few code samples on how to read initParams from javascript, but so far nothing from C#.  In javascript, one would call sender.getHost() to get a reference to the SilverlightControl, and use that to read the initParams.

I can't find the equivalent in managed code.  Any suggestions?

Thanks,

-Jason-

Re: initParams in managed code

06-19-2007 4:21 AM |

Give this a try:

A string dictionary is available in the current WebApplication instance:
WebApplication.Current.StartupArguments

Namespace:
using System.Windows;

Hope this helps,
-Jeff

Re: Re: initParams in managed code

06-19-2007 3:57 PM |

Jeff - This does not seems to work the dictionary for StartupArguments always seems to be empty

Re: Re: initParams in managed code

06-19-2007 4:11 PM |

The access to the Silverlight host has been disabled for C# in the alpha release because of an issue related to Safari on Mac, it should be back in the next release. But you can access this value from JavaScript. Mark your class as scriptable, define an event and mark it as sciptable, register the instance of your class, and subscribe to the defined event. In the event handler get the Silverlight host and get the initparams. set initparams on your registered object.

I am in a hurry so there may be some ambiguity in what I say. If so please post a follow up question. If this is sufficient please select "mark as answer"

Re: Re: initParams in managed code

06-19-2007 8:14 PM |

I think I have a solution.  First, get the ID of the Silverlight control as detailed in the "How can I acquire the Silverlight HtmlElement control?" post (see http://silverlight.net/forums/t/2173.aspx).  Then just invoke the following:

string params = HtmlPage.Document.GetElementByID(SilverlightId).GetAttribute("initParams") ;

Re: Re: Re: initParams in managed code

06-20-2007 4:56 PM |

Yasser - What if you have multiple instances of  the same silverlight control on a page.. (How will the Java script to manage code work)

Re: Re: Re: initParams in managed code

06-20-2007 5:36 PM |

This will not be a problem. The event wiring will be instance specific. For example if you have two Silverlight controls with IDs control1, control2

You will first need to get a reference to the Silverlight control through getElementByID:

var control1 = document.getElementById("control1");
var control2 =  document.getElementById("control1");

Then wire to the control specific handler

control1.content.myScriptableObject.myEvent = handler1;
control2.content.myScriptableObject.myEvent = handler2;

This approach is useful if you need instance specific handlers. If all you needis to set the initparams of the right instance, this could be easily done by submitting the control instance as the sender parameter of the instance
If this answers your question please select "Mark as Answer". If not please post a follow up question

Re: Re: Re: initParams in managed code

06-21-2007 5:06 AM |

hello.

well, i like the approach but i think that using events are overkill for this. I prefer to go with a property because it reduces the code I need to write.

Re: Re: Re: initParams in managed code

06-21-2007 5:13 AM |

Could you share the CreateSilverlight JavaScript you're using, which includes the initParams, etc.?  It should be a comma-deliminated list... I'd like to try to repro this on my Mac Mini... (I'm looking at the managed code WebApplication dictionary access, not the JavaScript solutions that've been discussed)

Thanks,
Jeff